Gas-control apparatus



March 6,1928. 1,661,252

R. FRlcKE ET AL GAS CONTROL APPARATUS Filed Oct. 2l, 1925 2 Sheets-Sheet 1 c uw' w aww @4t/@afa uw i M,

March 6, 1928.

R. FRICKE ET AL GAS CONTROL APPARATUS Filed Oct; 2l. 1925 2 Sheets-Shoot. 2

hf/ e Patented Mar. 6, 1928.

UNITED STATES RICHARD FRICKE, OF LEIPZIG-KLEINZSC-HOCHER. AND yHANS MROSS, OF PRETZSCH-ON- THE-ELBE,

GERMANY.

GAs-ooNTRoL APPARATUS.

Application led October 21, 1925, Serial No. 64,061, and in Germany August 6, 1924.

Our invention refers to control apparatus for gas supplying systems and more, especially` to means for controllingr gas heaters,

employed t'or instance in heating vulcanizers and other closed vessels in which steam or gases are developed in consequence of the heat treatment. Itis an objectof our invention toprovide .a control device which renders permanent attendance to vulcanizers as used for instance in dental laboratories and similar apparatus unnecessary, the regulation of gas supply for the heating of such vulcanizers and the like being controlled automatically.

According to the present invention the pressure of the steam generated in the vulcanizer or the like is Iliade to act on a displaceable member which is arranged to act on a valve or the like inserted in the gas supply and on an alarm in such mannerthat as the pressure in the vulcanizer rises, the supply of gas is reduced and the alarm is set operating.

The displaceable member need not be one which is displaced bodily as a whole, such as a piston or the like, but it may be for instance a metal or other diaphragm, deformed by the steam pressure, so that only one part of it is displaced.

In the drawings aiixed to .this specification and forming part thereof a device embodying our invention is illustrated diagrammatically by Way of example.

In the drawings Fig. 1 is a side elevation, and

Fig. 2 is a rear elevation, partly in crosssection, drawn to a larger scale, while Fig. 3 is an elevation showing the combination of theV same device with a dental vulcanizer.

In the modification illustrated in the drawings the alarm is represented by an'alarm clock which on the gas valve or cock having been' operated Vwill after apredetermined` period of time be operated to notify the attendant and will at the same time cut out the gas supply entirely.

Referring to' ythe drawings, is the vulcanizer and b is a pipe leading from the steam space of the vulcanizer to a case o surrounding a metal diaphragm d, on the under side y' of which the pressure of the steam generated in a acts so as to cause the deformation of -the diaphragm. On the upper side of the diaphragm rests a movfthe, valve le allows a quantity o able pin e, the top end of lwhich is applied against a lever f pivotally mounted on the part: l1. by means of pivot pin g. The part la is screwed on to the case c so as to be vertically displaeeable-thereon and z' is a screw serving to fix part L in position on the case c.

2, z are tube nipples communicating with each other across the part lz. for inserting the device in the gas supply of the vulcanizer and is an admission valve inserted in the boring connecting the two nipples. l is a spiral spring mounted on the Valvel spindle and tending to close the valve. IVhen the vulcanizer is heated up, the valve assumes reduce the free cross-sectional area of the gas passage. A pin n screwed into the part l1. extends into the path of the hand lever o mounted on the valve spindle lr: and prevents this latter from being turned far enough to altogether close the gas supply. y

In the position determined b the pin n gas to pass through, which corresponds to the generation of a predetermined steam pressure which is intended to prevail in the vulcanizer a during a predetermined time after heating has been started. By adjusting pin n this position ofV valve lc can be varied. On the other hand part It can be adjusted vertically by turning it on part e so as to vary the distance between the diaphragm d and the lever f. whereby this latter causes valve k to bey released at a greater or smaller steam pressure. I

On part l1. is mounted an alarm clock p, the alarm spindle of which carries a slotted level' g embracing a lever i' which is fixed on a stop cock s mounted in the boring connecting the nipples e, z.

On the lever o mounted on the spindle of valve It is further mounted a resilient brake arm t which in the position shown in the draw/ing `applies itself against the governor (balance wheel) a of the clock in such manner as to brake it and prevent it from moving, thereby stopping the clock work. How- 1ever as soon as lever 'f releases valve k lever o will be rocked until it meets pin n and in doing so, the brake member t Will not only. release the governor u, but it will also positively actuate it by carrying it along in its angular' movement 'and will thereby set the clock work Working. After the lapse of time for which the alarm has been set, it will operate so as to advise the attendant and at the same time lever g Will act on lever fr soJas to close the stop cock ,8, thereby cutting out the gas supply altogether.

In order to render the `device operative again, 'valve l: need1 merely be turned by means of handle v mounted on the lever o, until lever f has come to rest against the check m. At the same time the stop cock a is opened by means of lever 1'.

In some cases it may prove sutlicient to merely provide for an automatic throttling of the gas supply, the Aoperation of the throttlingmember being accomplished by i enced by said member, an alarm influenced by said valve, a. closing spring connected with said valve and a locking member for said spring arranged to be thrown out by said displaceable member. v

2. Gas control apparatus for vulcanizers land the like comprising a member displaceable by steam pressure, a gas admission valve influencedby said member, an alarm clock, a regulator forming part ot Said cloekand means connected with said gas admission valve for braking said regulator as long as said valve is o en and for positively actuating said'regu ator, wli'en it is being closed. 3. Gas control apparatus for vulcanizers and the like comprising a member displaceable 'by steam pressure, a as admission valve influenced b said mem er, an alarm clock, a regulator ormin and a lever fixed to 'sai valve, a resilient part on said lever normally applied against said re'ulator so as to brake same, the position ofD said resilient part relative to said 1regulator being such that on releasing said regulator said resilient part .will `positively actuate said regulator.

4. Gas 'control apparatus for vulcanizers and the like comprising a member displacepartof said clock able b steam pressure, a gas valve influenced y said member, an alarm influenced by said valve, a closing spring connected with said valve, a locking member for said spring arranged to be thrown out by said displaceable member and an adjustable stop foil limiting the closing movement of said va ve.

In testimony whereof we have ailixed our signatures.

` DR. RICHARD FRICKE. HANS MROSS. 

